@import url(./复习.html);
#one{
	width: 1000px;
	height: 200px;
	background-color: yellow;
	margin: 0 auto;
	border: 3px solid #000;
}

#two{
	width: 200px;
	height: 600px;
	background-color: red;
	float: left;
	border: 3px solid #000;
}

#three{
	width: 200px;
	height: 600px;
	background-color: blue;
	float: right;
	border: 3px dashed #0F0;
}

#four{

}

.class{
	width: 300px;
	height: 300px;
	background-color: green;
}